Changeable-speed-gear mechanism.



WI'INESSES:

H. L. SCHENGK. GHANGEABLE SPEBDfiBAR MECHANISM.

APPLICATION TILED MAY 2. 1912- Patented Ap 28 2 SHEETS-SHEET 1.

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H. L. SGHENGK. GHANGBABLE SPEED GEAR MECHANISM. APPLICATION rxLnn MAY 2,19'12.

1,094,751. Patented Apr. 28, 1914.

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H m I 0 D a 5 I Q m I x 0 R? L N o N w s w 0 Q) I H Q Q "HUI H \2 I f an s Q 4 c. A. N imaxzw WITED STATES PATENT OFFICE.

HENRY L. SCHENCK, OF DECATUR, ILLINOIS, ASSIGNOR OF ONE-FOURTH TO HOWARDM. ONYETT, OF DECATUR, ILLINOIS, AND ONE-FOURTH TO THOMAS J. DRAPER, OF

MOUNT ZION, ILLINOIS.

CHANGEABLE-SPEED-GEAR MECHANISM.

Specification of Letters Patent.

Application filed May 2, 1912.

Patented Apr. 28, 1914.

Serial No. 694,639.

1 '0 all whom it may concern:

Be it known that I, HENRY L. Sonaxon, a citizen of the United States ofAmerica, residing at Decatur, in the county of Macon and State of.Illinois, have invented certain new and useful Improvements inChangeable-Speed-Gear Mechanism, of which the following is aspecification.

This invention relates to certain new and useful improvements inchangeable speedgear transmission mechanism, the object be ing toprovide mechanism for changing the speed of the engine in which themechanism is used in connection, without shifting the gears, therebyreducing the wear and providing a noiseless transmission.

A further object of the invention is to provide a transmission gear soconstructed that the gears are always in mesh, whereby any one of thegears can be brought into operative position so that the operator caninstantaneously select any one of the gears.

in order to obtain the desired speed or reverse.

A still further object of the invent-ion is;

to provide a mechanism which is so constructed that direct drive throughthe center of all gears can be obtained with all the gears in mesh.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the drawings-Figure 1, is an elevation of my improved transmissiongearing, one side of the casing being removed in order to show themechanism; and Fig. 2, is a similar view showing the mechanism insection.

In the drawing 1 indicates a casing which may be formed of any design orconfiguration, but herein shown rectangular in shape, having bearings 2,3, 4 and 5 at its opposite ends, which may be roll or ball as desired.Mounted within the bearing 5 is a driving shaft 6 having an enlargedportion 7; the end thereof being provided with a longitudinal boreforming a tubular portion 8 in which the circular portion 9 of a drivenshaft 10 is revolubly mounted, the opposite end of said shaft beingmounted in the bearing 1. The driven shaft 10 is provided with enlargedcircular portions 11, 12 and 13 on which are loosely mounted gear wheels14, 15 and 16, said wheels being positioned thereon by set screws 17traveling in annular grooves 18 formed in the enlarged portions of thedriven shaft as clearly shown in Fig. 2. The gears 14, 15 and 16 areprovided with hub portions having clutch members 19, 20 and 21; and thegear 14: forms a reverse gear; the gear 15 a low-speed gear; and thegear 10 an intermediate speed gear, as will be hereinafter fullydescribed.

Mounted within the bearings 2 and 3 is a counter shaft 22 on which isfixed adjacent one end, a gear 23 which is driven by a pinion 24 looselymounted on the enlarged portion 7 of the drive shaft 6; said pinionbeing provided with a clutch member 25 adapte to be normally held inoperative engagement with a double clutch member 26 fixed on the driveshaft 6, as clearly shown in Fig. 2 by a coil spring 27 surroundingthe'enlargcd portion, as clearly shown. The counter shaft 22 is providedwith a gear 28 meshing with the low-speed gear 15 and a gear 29 meshingwith the in termediate speed gear 16 which are always in mesh and itwill be seen that when the ear 23 on the counter shaft 22 is driven bythe pinion 24, the gears 15 and 16 will be driven in the same directionas the pinion 24. Meshing with the reverse gear 14 is an idle gear 30which is driven by a gear 31 fixed on the counter shaft 22 in order toreverse the direct-ion of rotation of the reverse gear.

For locking either of the reverse or lowspeed gears to the driven shaft,I provide the latter with a reduced square portion 32 on which isslidably mounted a double clutch member 33 controlled by a shifting arm34; arranged upon the shifting rod 35, and it will be seen that when therod is shifted longitudinally in one direction, the clutch member 33will be thrown into operative engagement with the low-speed gear 15 andwhen shifted in a reverse direction, will be thrown into operativeengagement wit-h the reverse gear 14.

In order to obtain a direct drive or high speed drive, I provide meansfor connecting the drive shaft 10 and the driven shaft 5 which comprisesa double clutch member 36 arranged u on the square portion 37 of thedriven sha t 10, and controlled by a shift.- ing arm 38 mounted upon ashifting rod 39. Fixed onthe double clutch member 36 isa sleeve 40 whichextends over the double clutchmember 26 and'the clutch portion 25 of thepinion;24 and is adapted to move the pinion 24 longitudinally upon theshaft 6 against the action of the spring so as to throw the clutchportion out of en agement with the fixed clutch 26; and it wi 1 be seenthat as this is thrown out of operative engagement the clutch 36is'thrown into operative engagement with the clutch 26, whereby thedriving and driven shaft is connected so as to obtain a direct drive. Byshifting the clutch 36 in an opposite direction, it will be thrown intoengagement with the clutch portion 21 of the intermediate speed gear 16,so as to drive the driven shaft at an intermediate speed. In order todisconnect all the gears and clutches it is only necessary tomove theclutch member 36 longitudinally upon the square portion 37 into such aosition as to throw the clutch 25 of the pinion 24 out of mesh with thedouble clutch 26 without throwing the clutch 36 into engagement with theclutch 26 and the drive shaft will beallowed to rotate freely.

While I have shown and described a pe-' culiar construction of clutchmembers, it will of course be understood that any form of clutch can beused and that the manner of mounting the same may be varied withoutdeparting from the s irit of my invention.

The operation of tie mechanism is as follows: Supposing that the gearsare in the osition as shown in the drawing, the drivlng shaft will drivethe pinion 24 which in turn drives the gear 23 of the counter shaft,causing the gears carried thereby, to revolve the reverse gear,low-speed gear and intermediate speedgear carried by the driven shaft.By operating the clutch member 33 in one direction the low-speed gearwill be thrown into operation and by operating the clutch in a reversedirection, the reverse gear will be thrown into operation. By operatingthe clutch member 36 so as to move toward the pinion, the pinion will bemoved longitudinally upon the drive shaft, and in order to provide meansfor preventing the pinion from being thrown out of mesh with the gear28, the width of the gear 23 is three times as great as the pinion,which is sufii cient to allow the pinion to move the desired distance sothat the clutch 36 will be thrown into operative engagement with theclutch 26 so as to unite the driven and drive shafts, in order to obtainthe high speed. When the clutch 36 is shifted in an oppositedirection,it is thrown into operative engagement with the intermediate speed gear,causing the driven shaft to rotate, and as shown in the drawing, thegears carried by the counter shaft are of different sizes in order toobtain the desired speed.

It will be seen that I have provided a selective speed changing gearingin which any of the speed gears can be thrown into and out of operationwithout throwing the gears out of mesh. I have also provided means forobtaining a direct drive through the center of all gears when at highspeed.

- I claim:

1. In a change speed mechanism, a driven shaft, a double clutch memberfeathered upon said driven shaft, a counter shaft, a gear carried bysaid counter shaft, a driving shaft arranged in longitudinal alinementwith the driven shaft, a double clutch member fixed on said drivingshaft, a inion loosely mounted upon said driving siaft meshing with thegear of the counter shaft and provided with a clutch face, a springnormally holding the clutch face in engagement with the cooperatingdouble clutch member of the driving shaft, a sleeve carried by thedouble clutch member of the driven shaft engaging said pinion, meshinggears carried by the driven and counter shafts, the gear of the drivenshaftbeing provided-with a clutch face coaeting with one of the faces ofthe feathered double clutch member of the driven shaft, and means forshiftingthe feathered double clutch member for connecting the clutchesof the driven and driving shafts and simultaneously disconnecting thepinion from the clutch member of the driving shaft.

' 2. In a speed change mechanism, the combination with a driving shafthaving a bore atone end, a driven shaft arranged inlongitudinalalinement with the driving shaft having a reduced portionextending into said bore, a clutch member mounted to move 10ngitudinallyupon said driven shaft, a double clutch member fixed upon said drivingshaft, a pinion having a co-acting clutch face loosely mounted upon saiddriving shaft, a spring for normally holding said clutch face of thepinion in engagement with one of the clutch faces of the. double clutchmember of the driving shaft, a counter shaft, a gear carried by saidcounter shaft meshing with the pinion, meshing gears carried by thecounter shaft and driven shaft, a sleeve carried by the clutch member ofthe driven shaft surrounding the double clutch member of the drivingshaft and co-acting with the pinion thereof for simultaneouslydisconnecting the pinion from the fixed clutch member and connecting theclutch member of the driven and driving shafts.

3. In a speed change mechanism, the combination with a driven shaft, ofa counter shaft, meshing gears carried by the respective shafts, adriving shaft arranged in lonitudinal alinement with the driven shaft, a

ouble clutch member fixed on the driving shaft, a pinion slidablymounted upon said driving shaft having a clutch face, a coil springsurrounding said driving shaft for holding said clutch face inengagement with contact with the clutch member and con- 18 the clutchmember'of said drivm' shaft, :1, nectin the clutch faces of theclutchmem gear carried by the counter shaft 0 a greater bers o the driving anddriven shafts. width than the pinion, a clutch member In'testimonvwhereof I afiix my signature 5 mounted to slide upon said driven shnft,a in presence 0 two witnesses.

sleeve carried by said clutch member sur- HENRY L. SOHENCK. rounding theclutch member of the driving Witnesses: shaft and co-acting with thepinion for si- Joe. E. BRAMBLE'I'I, multuneously throwing said pinionout of U. G. GILE.

Copies of this patent may be obtained for live cents each, by addressingthe Commissioner of Patents,

Washington, D. 0."

